Stair Stringer Calculator

Riser & Tread Code Check

$6.99 · Designed for iPad. Not verified for macOS.

Calculate rise, run, stringer length, angle, and validate against IRC R311.7 building code instantly. Building stairs and need code-compliant riser and tread dimensions? Get stringer layout with automatic IRC building code validation before you make a single cut. Stair Stringer Calculator computes riser height, tread depth, stringer length, stair angle, and validates against IRC R311.7 residential stair requirements. Enter your total rise and available run to get a complete stringer layout that passes inspection. WHAT YOU GET: - Individual riser height and tread depth - Number of risers and treads - Stringer hypotenuse length - Stair angle from horizontal - Stock length needed for lumber order IRC R311.7 CODE CHECKS: - Maximum riser height 7-3/4 inches (196mm) - Minimum tread depth 10 inches (254mm) - Riser uniformity validation - Headroom clearance check - Pass/fail status for each requirement ADJUSTABLE INPUTS: - Total rise (floor to floor) - Total run (horizontal distance) - Number of steps with stepper control - Instant recalculation on every change WHO NEEDS THIS: - Carpenters framing new staircases - Deck builders planning exterior stairs - General contractors verifying subcontractor work - Building inspectors checking compliance Works completely offline. No account required. Get a code-passing stair layout in seconds before you pick up the saw.

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Bug fixes and performance improvements.

Version 1.0.1

The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    • 887.8 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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